Circular RNAs (circRNAs) are a class of endogenous non-coding (ncRNAs) involved in regulating skeletal muscle development by sponging miRNAs. In this study, we found that the circMYL1 expression was down-regulated during myoblast proliferation, while gradually up-regulated differentiation. The potential role identified proliferation bovine through mRNA and protein marker genes (PCNA, CyclinD1, ...